DE202005003963U1 - Folding railings for bridges and river side with an automatic fold action in flood conditions via floats and drive linkage - Google Patents

Abstract

A system of folding railings which fold down flat in flood conditions has the railing sections (2) connected to a linkage (5 to 8) fitted with floats (9). In normal, or low water levels the railings are set vertically. In flood conditions the floats rise upwards and cause the railings to fold flat thereby preventing collection of floating debris. The railing system can be fitted to river sides, bridges and other mountings. The linkage can be via a system of arms and/or rack and pinion drives. The floats can be any suitable shape and are fitted with filling and emptying ports.

Description

The The invention relates to a folding railing on hydraulic structures (Docks, locks, weirs, dams, wharfage, bank attachments), but especially at river bridges and jetties for flowing waters.

at highly water-bearing rivers and a water level over the bridge level or the kauche beyond, there is an accumulation of flotsam on the railing, which is usually an undesirable one Water retention causes and upon reaching a certain density the Treibgutanlagerung to damage or even completely destruction of the railing and the bridge or the hydraulic structure itself leads.

Known are bridge railings for river bridges whose footboards are hingedly attached to the bridge and the with the bridge posts or bridge piers locked by screwing. To avoid Treibgutanlagerungen at high tide can Manually loosened the locking couplings and the bridge railings Flood hazard can be transferred manually.

adversely is because the staffing requirements are often not enough in a flood area with a variety of bridges and hydraulic structures in a timely manner to transfer all railings and that it as well requires a considerable organizational or logistical effort, to secure all danger spots in time.

task The invention is a railing for hydraulic engineering Plants, in particular such for river bridges to make, which automatically upon reaching a critical high water level without external energy hydromechanical wholly or partly in an approximately folded horizontal position, thereby causing a water accumulation due to To avoid driftwood accumulation.

According to the invention Task as with the claims specified resolves.

Advantageous is at the design of the invention the railing, that in the event of a risk of flooding, it will automatically be in time, for example, in the bridge or in the vicinity flips over and thus a largely unimpeded flow of Water allowed.

risk of damage of the railing or even the bridge by heavy flotsam such as tree trunks or the like as well as consequential damage resulting from it A traffic jam can be minimized considerably. The so designed bridges and hydraulic structures require No involvement in a disaster management and no energy supply to activity possibly installed electromechanical drives.

Of the Mechanism guaranteed high reliability and requires little maintenance,

below The invention is the embodiment a foot bridge explained.

In the associated Drawing is with

1 a river bridge with railing in cross section in normal position and with

2 a river bridge with railing in cross section in flood position

3 a river bridge with multi-part railing shown schematically in the side view.

The river bridge 1 consists on both sides of a three-piece railing, with each railing part 2 Equally designed and dimensioned.

Every terrain part 2 is 3 m long and 1.30 m high. The railing part 2 is foot on each of its outer post 3 . 3a on each of a bridge longitudinal side 4 hinged so that it is positioned vertically on the one hand by means of a stop and up to approximately in a horizontal plane on the river bridge 1 is pivotable.

At each of the outer posts 3 . 3a is in pairs from the articulation point 5 . 5a the same at the river bridge 1 spaced on the one hand the strut 6 . 6a hinged, which on the other hand at the upper end of the two-sided lever 7 . 7a is articulated. At the upper longitudinal side 4 the river bridge 1 is a console for each lever linkage 10 . 10a arranged at which the fulcrum 8th . 8a the two-sided lever 7 . 7a is located. At the other end of the two-sided lever 7 . 7a this is on the float 9 hinged. Parallel to the lever 7 . 7a is between the console 10 . 10a and the float 9 the parallelogram brace 11 . 11a articulated.

In function of the bridge railing, this is done by the lever 7 . 7a hanging float 9 and about the lever 7 . 7a and the strut 6 . 6a acting gravity and vertically positioned by the foot-side stop.

By means of the float 9 located filling and emptying openings, both the gravity and the buoyancy of the float is adjustable.

As soon as the water level or the level reaches the river bridge 1 rises, the float experiences 9 a buoyancy, which means of the lever linkage 6 . 6a and 7 . 7a on the railing part 2 is transferred so that the railing part passes with increasing water level from its vertical position to a horizontal position. The float 9 reaches thereby approximately up to the height of the bridge railway. The river water with the flotsam now can the Flussßbrücke 1 even above this they pass unhindered and without any particular resistance.

The railing part 2 remains there until the water level drops. With increasing reduction of the water level causes the gravity of the float 9 now over the lever linkage 6 . 6a and 7 . 7a in reverse order, so that the railing part rises up to its original vertical position and remains in it until the next flood.

1

river bridge

2

balustrade part

3, 3a

Outside posts

4

Bridge longitudinal side

5, 5a

articulation

6 6a

strut

7, 7a

lever

8th

pivot point

9

float

10 10a

console

11 11a

parallelogram

Claims (7)

Folding railings on hydraulic structures (river bridges, docks, jetties, locks, weirs, dams, flood defenses, quays), but especially at river bridges and jetties for flowing waters, characterized in that the railing of independently movable terrain parts ( 2 ), each railing part ( 2 ) hinged at its location with its attached to the hydraulic structure lower longitudinal side transversely to the same hinged at its location hinged and that each railing part ( 2 ) via at least one lever linkage ( 6 . 7 ) or by means of racks and gear segment drive with at least one arranged outside the railing location, in the normal state at normal water level, hanging over the water surface floats ( 9 ) or vertically movable float ( 9 ) is connected or deflected so that the floating body ( 9 ) at normal or low water level by its gravitational effect the railing part ( 2 ) in stable vertical normal position. Railing according to claim 1, characterized in that the floating body ( 9 ) is a hollow body. Railing according to claim 1 and 2, characterized in that the floating body ( 9 ) has at least one closable filling and emptying opening. Railing according to claims 1 to 3, characterized in that the floating body ( 9 ) has a rectangular or round cross-sectional shape. Railing according to claims 1 to 4, characterized in that the lever ( 7 ) of the lever linkage ( 6 . 7 ) as part of a parallelogram linkage with the two-sided lever ( 7 ) and the parallelogram strut ( 11 ), wherein the parallelogram strut ( 11 ) of the parallelogram linkage at the float ( 9 ) and on a console ( 10 ) are hinged at the railing location and wherein the two-sided lever ( 7 ) of the parallelogram linkage with its lower end on the float ( 9 ) and with its fulcrum ( 8th ) on the console ( 10 ) and with its upper end via a strut ( 6 ) with the railing ( 2 ) is directed together. Railing according to claims 1 to 5, characterized in that the railing of several separate railing sections ( 2 ) consists. Railing according to claims 1 to 6, characterized in that the floating body ( 9 ) at a river or pier at flood level not higher than at the level of the folding railing ( 2 ) is positioned.